Type-writing machine.



w. A. LORENZ. TYPE WRITING MACHINE.

APPLICATION FILED APR. 16, 1909. I I 1,082,-5 38. Patented Dec. 30, 1913.

v 2 SHEETS-SHEET 1.

L J W/TNE A INVENTUR 1 BY 1AM W. A. LORENZ. TYPE WRITING MACHINE.

urmcumn rum) APR. 16, 1909. i

Patented D80. 30, 1913.

Fig.4-

UNITED STATES PATENT OFFICE.

WILLIAM A. LORENZ, 0F HARTFORiD, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO'1HE NOISELESS TYPEWRITER' COMPANY, OF IMIDIDLE'LOWN, CON- NECTIOU T, A CORPORATION OF CONNECTICUT.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

T 0 all whom it may concern 4 Be it, known that l, \VILLIAM vA. LORENZ, a citizen of the United States, residing at Hartford, in the county of Hartford and State of-Connecticut, have invented certain new and useful Imrovements in Ty e- Vriting Machines, 0 which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertainstomake and use the same.

I This invention relates totypewri'ting machines, and one of the objects thereof is to .provide new and. improved means for arresting the movements of various operative parts thereof in a silent manner.

Another object is to provide mechanism designed to reduce to aminimum impact or concussion of moving parts during the operation of the machine.

Other objects will be in part obvious and in part pointed out hereinafter. W

' The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth,'and the scope of the application of which will .be indicated in the following claims.

In the accompanying drawings, wherein is illustrated several. of variousposslble embo'diments of the invention, Figure 1 represents a front view of the preferredembodl- 'ment of the invention; Fig. 2 is a sectional view thereof on line 22 of Fig. 1; Fig. 3 is a view of certain parts of Fig. 1 in another position; Fig. 4 is a view in front elevatlon of a different embodiment of the invention;

Fig. 5 is a .side view thereof; Fig. 6 is a view in front elevation of stillanother embodiment of the invention; and Fig. 7 is. a-

side view. thereof.

' Similar reference characters refer to simiscrews 2 which'carry a universal rock shaft 3 from which extend arms 4. These arms, by means of links 5, support the universal 'bar. 6 upon which rest the several key levers 7, the latter being pivoted upon a bar 8 and held upwardlyv by means of coil springs 10 against the stop 11. -The universal bar 6 is held. against the lowersurfaces of the keys7 by means of a coil spring 12 which extends between a fixed portion of the machine and an arm 13 extending from the universal rock shaft 3. The universal bar at its central port-ion is provided with dependingears 15 between which extends a stud 16, saidstud, in the present instance, carrying rollers 17 and 18.

A cross brace 20 supports, by means of a clamp screw 21, a vertically adjustable bracket 22. This bracket is provided with'a projecting ear 23 which .bears against the roller 17 and is also provided with two studs Patented Dec. 30,1913.

24 and 25 each of which supports a roller 26.

- 27 is provided with a pin 30 to which the coil spring 31 is attached, the other end i said spring being secured to a post 32 extending from bracket 22. Slide 27 is provided with a projecting portion or finger 33 and also with a concaved surface 34, roller 18 of the universal bar normally bearing against said projecting portion 33, as shown in Figs. 1 and. 2. -The cam surface 34 is struck from an arc of larger radius than that of the roller 18, and the radius of the cam surface gradually decreases in a downward direction.

, Having thus described the construction of this embodiment of my invention, the operation thereof may now be understood. When the universal bar is depressed by a key lever to bQJIIlOVGd from the position shown in Fig. 1 to that in Fig. 3, the roller 17 will roll againstthe face of projection'23, and the roller 18 will roll against the face of projection 33. The face of projection 23 is made vertical in order that the travel of the universal bar may bein a straight line and said part therefore acts as a guide for the universal bar during its downward movement. The face 35 of projection 33 may be made vertical or slightly inclined. The universal bar continuing its downward movement engages the cam surface 34 and moves the cam slide sidewise until the roller strikes the lowermost portion thereof when the universal bar will be brought to a gradual stop, the stopping thereof being effected without noise. It will be understood, of course, that the endwise movement of the .such normal position.

in Figs. 4 and 5 the universal bar 6 is prothe vertical face 46 rides.

also supports, as by means of rollers 52, the

vided with rollers 17 and 18 mounted upon the stud 16. The brace 20 is provided with the vertically adjustable bracket 22 which is provided with two slides 36 and 37, one slide being provided with a projecting portion 38 and a curved cam portion 40, and the other with a projecting portion 41 and a similar cam portion 42. These two slides are provided with projecting ears 43 connected by a retractile coil spring 44. When the universal bar is moved downward the roller 17 will roll against the projection 38'and cam surface40 and the rller 18 will roll against the projection 41 and, cam surface 42. Upon reaching the doizvnward position the. two slides 36 and 37 will be separated and the universal bar will be gradually brought to a stop.

In the embodiment of the invention shown in Figs. 6 and 7 the universal bar is provided with a downward projecting guide piece 45 having a vertical face 46 on one side for its entire length, and having a flat face 47 on the opposite side for a portion of its length,

said flat portion merging into a curvedface 48 above the vertical' face. To the brace 20 is attached a vertically adjustable bracket 50 which supports the roller 51 against which The bracket 50 slide 53, said slide being provided with a roller 54 which normally bears against the v face 47 of guide 45. A spring 55 extending between the slide and the bracket urges roller 54 int engagement with the face 47 of guide 45. When the moving member or universal bar is moved downward,"'no resistance is offered except the spring pressureexerted upon the slide 53 until the universal bar reaches a posit-ion near the end. of its downward movement, when the motion of the moving member will be gradually resisted by means of the cam face 48, and such motion will ultimately be arrested by the cam surface when the horizontal portion of said surface shall have been engaged by the roller.

It will accordingly be seen that I have provided mechanism of the above character well adapted to attain among others all the ends and objects above pointed out in a simple yet efficient manner. The elimination noaaess of concussion or impact between the moving parts insures a silent operation, and the rolling contact between the rollers and the cam surfaces reduces friction to a minimum, insurin a ready and quick respond of the universa bar to the touch of the operator, or to movement impelled by the spring-controlled cam or roller devices when the pressure is removed from the key levers.

While I have shown and described my invention applied to the universal bar of a typewriting machine, I wish it to be understood that I do not intend to limit its employment to these precise relations, as the same is capable of use in a variety of relations in machines of this, as well as those of other types.

Aamany changes could be made in the above construction and .many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it. is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

Havmg described my invention, what I claim as new and desire to secure by Letters Patent is: a

1. The combination with a movable part of -a typewriting machine, of means for arresting the movements thereof without impact or concussion comprising a fixed member for guiding the movable part, and a reciprocatmglmember having a cam portion engaging t e movable part.

2-. The combination with a movable part of a typewriting machine, of means for arresting the movements thereof without im pact or concussion comprising a fixed member which operates to guide.the movable member, a reciprocating member having a cam surface, and means located upon the movable member adapted to traverse said c1211 surface when the movable part is actua 3. The combination with the movable part of a typewriting machine, of means for arresting the movements thereof without impact or concussion comprisin a fixed part,.a roller mounted on, one of said parts, a member having a cam surface mounted to slide upon the other of said parts, and spring means for holding said cam surface and said roller in constant engagement.

4. The combination with the movable part of'a typewriting machine, ofmeans for arresting the movement thereof without impact or concussion comprising a slidable part, a roller carried by one of said parts, a cam member carried by the other of said parts, and spring means for maintaining a 5. The combination with the movable part pact or'Tcdncussioncomprising a fixed part,

a relatively movable sliding cam and roller mechanism, one portion of which is mounted upon the movable parkand the other thereof upon the fixed part; and spring means cooperating with said cam and roller mechanism to oppose a relative movement thereof.

7. The combination with a movable part of a typewriting machine, of means for n.

resting the movements thereof without impact or concussion comprising a fixedpairt, a relatively movable sliding cam and roller mechanism one portion of which is mounted upon the movable part and the other thereof upon the fixed part, spring means cooper ating with said cam and roller mechanism to oppose a relative movement thereof, and means for guiding said movable part.

8. The combination with the movable part of a typewriting machine, means for arresting the movements thereof without impact or concussion comprising a fixed part, a memher having a concave cam surface mounted on one of said parts and adapted to slide thereon, a roller carried by the other of sai parts engaging said cam surface, and spring means for holding said roller and cam surface in constant engagement.

9'. The combination with the movable part of a typewriting machine, of means for arresting the movements thereof without impact or concussion comprising a fixed part, means upon the fixed part forcausing said mt'ivable member to move along a straight line, a member provided with a concave cam surface carried by the fixed part and adapted to slide thereon, means carried by the movable part for traversing said cam surface, and spring means for holding said lastment-ioned means and said cam surface in constant engagement.

10. The combination with a movable part ofa typewriting machine, of means for arrest-ing the movements thereof without impact or concussion comprising a roller carried by the movable part, a member mounted to reciprocate upon the fixed part having a concavely formed cam -path, said roller being adapted to traverse said cam-path during the movement of said movable part, whereby the member provided with the campath will be moved endwise, and spring means interposed between the roller and said reciprocating member for maintaining thecam-path of the latter in constant engagement with said roller.

11. The combination with a movable part ofa typewriting machine, of means for arrest-ing the movements thereof without im p'act or concussion comprising a fixed part, a member rotatably mounted upon one of said parts,a member slidably mounted upon the other ofsa'id parts, and means for holding said members in constant engagement.

12; The combination with a movable part of a typewriting machine, of means for arresting the movements thereof without impact or concussion comprising a fixed part, a roller mounted upon one of said parts, a

reciprocatory cam member mounted upon the other of said parts, and spring means for maintaining a constant engagement between said roller. and said cam.

13. The combination with a movable part of a typewriting machine,- of means for arresting the movements thereof without impact or concussion comprising a roller car ried by the movable part, a cam member mounted toslideupon thefixed portion of the machine, and spring means adapted to hold said cam member in engagement with said roller. 1

let. The combination with a movablepart of a typewriting machine, of means for arresting the movements thereof without impact of concussion comprising a fixed part, a member having a :concave cam surface mounted upon thefixed part, means mounted upon the movable partadapted to traverse said cam surface when the movable part is actuated, means for maintaining the means upon the movable part" and saidcam surface in constant engagement, and means for causing the movable part to move in a straight line. v

15. In t'ypewriting machine, the combination -"with the universal bar and the key levers which rest thereon, of means for, arrest: ing the downward movements of the key levei's without impact or concussion comprising a roller journaled on the universal bar, a member mounted to reciprocate upon a fixed portion of the framing of the machine and having a concavely formed cam -path the surface-of which is formed upon an arc of decreasing radius, and means for maintainingsaid roller in constant engagement with-said cam-path.

16. In a typewriting machine, the combination with the universal bar and the key levers which rest thereon. of means for arresting the downward movements of the key levers without impact or concussion comprising a roller mounted upon the universal bar, a sliding member having acouits its

cavely formed cam-path alon'geachside of "the roller, spring means for mamtaining the cam portion of said memberand said roller in engagement, a second roller mounted right angles to the direction of the movev member may ment of the movable part, means upon the other of, said parts for traversing said cam -means, a nd spring means for holding said cam means and said'traversing means in constant engagement.

18. In a'typewrit-ing machine, the combination with the universalbar and the key levers which rest thereon, of means for arresting the downward movements of the key levers. without impact or concussion com prising a roller journaled upon the universal bar, a sliding member provided with a concave cam surface carried by a fixed portion of the machine, the cam surface of which is formed upon an arc of decreasing radius, a roller carried by the universal bar adapted to traverse said cam surface when the universal baris depressed, a spring for maintaining said cam surface and said roller in engagement, a secondroller carried by the universal bar, and a guide carried by a fixed portion of the framing of the machine and engaging said last mentioned roller, whereby said universal bar is caused a; move in a straight line when depressed.

19. In a typewriting machine, the combi nation with the universal bar and the key levers which restthereon of means for arresting the movement of the key levers when depressed comprising a roller mounted upon the universal bar, a member provided with a concavely formed cam surface adapted to reciprocate upon a fixed portion of the machine, a spring for maintaining said .cam surface and said roller in engagement, a second roller carried by the universal bar, and a guide carried by a fixed portion of the machine which .engages said last mentioned roller and thereby causes the universal bar to move in a straightline when depressed.

20. In a typewriting machine, the combination with the universal bar and the key levers which rest thereon, of means for arresting the movements oi the key levers when depressed'comprising a roller mounted upon the universal bar, an endwise movable member provided with a concavely formed cam surface, a bracket mounted upon the fixed portion of the machine in which said he slid, a spring for maintain- ,iiig the cam surface of said member and sald r'olle'rin constant engagement,

."Coples 0! this patent may be obtained for a second roller mounted upon the universal bar, and a guide extending upward from said bracket and engaging said second roller adapted by such engagement to cause the universal bar to move in a straight line when depressed.

21. The combination with a movable part of a typewriting machine of means for arresting the movement thereof without impact or concussion comprising a reciprocating member having a cam portion engaging said movable part, and means for adpisting one of said parts to change the limit of the path of travel of said movable part.

' 22. The combination with amovable part ofa typewriting machine of means for arresting the movement thereof without impact or concussion comprising a reciprocating member having a cam portion engaging said movable part, and means for adjusting'said reciprocating member in the direction of the path of travel of said movable member.

23. The combination with a movable part of a typewriting -machine of means for arresting the movement thereof without impact or concussion comprising a fixed part, a member rotatably mounted upon one of said parts, a member slidably mounted upon the other of said parts, means for holding said members in constant engagement, and means for adjustin said arresting 'means in the directiono the path of travel of said movable member. ,v

24. The combination wi 'h a movable part of a'typewriting machine of movable means for silently arresting the movement thereof without impact or concussion, a sprin adapted to act on said movable means an means for adjusting said movable arresting means in the direction of the path of travel ofthe movable part.

25. The combination with a movable part of a typewriting machine, of means for silently arresting the movement thereof without impact or concussion, comprising a relatively fixed guiding member and a coacting movable cam member adapted to engage the movable member.

26. The combination with a movable part of a typewriting machine, of means movable at right angleslto the direction of movement of the movable part adapted to silently arrest the movement thereof, a spring adapted to act on said movable means and hold the same in normal position, and means for adjusting said-movable means with respect to said movable part.

In testimony whereof aflix my signature,

NnLLm PHOENIX.

flvecents each, by. addressing the Gommissioner ,0! Patents,

Washington, D. G. 

